Vibratory grinding mill of the drum type

Claim 1

A CONTINUOUSLY OPERABLE VIBRATORY GRINDING MILL COMPRISING AN UPPER AND LOWER VIBRATORY GRINDING DRUM EACH HAVING AN AXIS EXTENDING SUBSTANTIALLY IN A HORIZONTAL DIRECTION, SAID DRUMS HAVING RESPECTIVELY AN UPPER INLET OPENING AT ONE END THEREOF AND A LOWER OUTLET OPENING AT THE OTHER END THEREOF, MEANS FOR CONNECTING THE LOWER OUTLET OPENING OF SAID UPPER DRUM WITH THE UPPER INLET OPENING OF SAID LOWER DRUM, A SCREEN PARTITION EXTENDING ACROSS THE AXIS OF EACH DRUM AND SECURED IN THE RESPECTIVE DRUM AT A LOCATION SPACED AXIALLY FROM THE OTHER END THEREOF, SAID PARTITION FORMING AT SAID OTHER END AN OUTLET CHAMBER ABOVE THE RESPECTIVE OUTLET OPENING, AND A DISCHARGE DEVICE MOUNTED IN EACH OF SAID OUTLET CHAMBERS AND COMPRISING A MEMBER HAVING A HOLLOW INTERIOR COMMUNICATING WITH THE RESPECTIVE OUTLET OPENING, SAID MEMBER OF EACH OF SAID DISCHARGE DEVICES BEING FORMED WITH AT LEAST ONE OPENING EXPOSING THE HOLLOW INTERIOR OF SAID MEMBER TO THE RESPECTIVE OUTLET CHAMBER.